Similarly, it's possible to write plugins that add new functions as
[[ikiwiki/pagespec/sorting]] methods. To achieve this, add a function to
-the IkiWiki::PageSpec package named `cmp_foo`, which will be used when sorting
+the IkiWiki::SortSpec package named `cmp_foo`, which will be used when sorting
by `foo` or `foo(...)` is requested.
The function will be passed three or more parameters. The first two are